<div class="container-fluid">
    <div class="row" style="padding-left: 10%;padding-right: 15%;">
        <div class="row" style="padding: 1rem">
            <div class="col-sm-2" style="padding-top: 2rem">
                <nav class="col-md-2 col-lg-1 sidebar" id="system">
                    <ul class="nav  flex-column" id="systemSetting">
                        <li class="nav-item nav-item-style"><a class="nav-link px-3 py-2" id="reference_manage" onclick="changeIframe(1)">文献管理</a></li>
                        <li class="nav-item nav-item-style"><a class="nav-link px-3 py-2" id="special_manage" onclick="changeIframe(2)">专题管理</a></li>
                        <li class="nav-item nav-item-style"><a class="nav-link px-3 py-2" id="word_manage" onclick="changeIframe(3)">主题词管理</a></li>
                        <li class="nav-item nav-item-style"><a class="nav-link px-3 py-2" id="monitoringData" onclick="changeIframe(4)">知识构建</a></li>
                        <li class="nav-item nav-item-style"><a class="nav-link px-3 py-2" id="heavyPollutionAnalysis" onclick="changeIframe(5)">用户管理</a></li>
                    </ul>
                </nav>
            </div>
            <div class="col-sm-10" >
                    <div class="row">
                      <iframe id="frame1" src='webApp/system_setting/reference_manage/reference_manage.html' style="width: 100%;height: 62rem"
                            frameborder=”no” border=”0″ marginwidth=”0″ marginheight=”0″ scrolling=”no” allowtransparency=”yes”></iframe>
                    </div>
            </div>
        </div>

    </div>
</div>